You can actually make mini greenhouses with the bottoms of plastic soda bottles. They fit pretty tightly around the pots so unless your cats were really determined, the starts would likely be safe. A 2 L bottle bottom fits snugly around a 4 inch pot, and the 750 ml bottle bottom fits around a 2.5 inch pot. I have some lemon and grapefruit seeds starting this way right now so here's a pic of what I mean.

That's such a great idea, Truly.

I live in a densely populated urban setting, so I think I can use your helpful idea to grow starter plants at home. We have community gardens in various locales across the greater metro area, but I don't live close enough to any of them, to make use of this kind of program. So I'm going to make use of your idea. Thank you !

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I'm not an avid gardener, but I do like to garden in small ways. Especially if I can use small foot print ideas and try not to support anything to do with Monsanto. But that's getting harder and harder to do lately. I read somewhere recently that plastic is now found in the human food chain, so that's a scary thought.

I did a tiny bit of looking online for resources that might come in handy (for anyone who wants to do their own research, etc).